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EricChew
Participant

Join Date: Feb 2009
Posts: 3

Best Valves for HF, HCl, HNO3 Acid Solutions

02/18/2009 11:40 PM

Does anyone have suggestions for valves to be used in acid mixture consisting of

  1. 25% Concentration Hydrochloric Acid @ Room Temperature and Atmospheric Pressure
  2. 45% Concentration Hydrofluoric Acid @ Room Temperature and Atmospheric Pressure
  3. 36% Concentration Hydrochloric Acid + 68% Concentration Nitric Acid both @Room Temperature and Atmospheric Pressure
  4. 200Microns of particles

Have thought of using Ceramics, but was told that Alumina is not suitable for Nitric Acid, and SiC is not suitable for Hydrofluoric Acid, and PFA or PTFE lined valves are not for erosive services.

Please share your thoughts!
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Pathfinder Tags: acid severe service valves
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Israel
Associate

Join Date: Sep 2007
Location: Mexico
Posts: 42
#1

Re: Valves Recommendation for HF, HCl, HNO3 Acid Solutions

02/18/2009 11:54 PM

Eric.

I found some supplier in the CHEMICAL ENGINEERING MAGAZINE december issue

www.grothcorp.com (281) 295-6800. Hopefully you can find some solution to your applicattion.

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 Israel Barron ibarron@sfmex.com
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Anonymous Poster
#2

Re: Valves Recommendation for HF, HCl, HNO3 Acid Solutions

02/19/2009 2:06 AM

What is the rest of the system made of?
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EricChew
Participant

Join Date: Feb 2009
Posts: 3
#3
In reply to #2

Re: Valves Recommendation for HF, HCl, HNO3 Acid Solutions

02/19/2009 2:38 AM

This is a reactor application. The reactor is PFA lined, but the particles only occur after the reaction. The valves would open to dump products to trucks when the reaction is complete. This is a purely On Off application.

Hence the valve would have addtional issue of erosion, not to mention about the corrosion by acids.

Thanks!
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Anonymous Poster
#4

Re: Best Valves for HF, HCl, HNO3 Acid Solutions

02/19/2009 11:45 PM

Have you ever seen a produt PDFE or poly prop
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SardMan
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Join Date: Dec 2008
Posts: 31
#5

Re: Best Valves for HF, HCl, HNO3 Acid Solutions

02/20/2009 7:42 AM

On off = Ball valve.

Try Nilcor valves. Very solid composite design.
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rahul.che@gmail.com
Member

Join Date: Feb 2009
Location: M.P UJJAIN-INDIA
Posts: 5
#6

Re: Best Valves for HF, HCl, HNO3 Acid Solutions

02/28/2009 11:26 PM

Tefloned line valve are good for acidic +aquous material (MSTL)- if teperature is below 60 deg the pp ( Poly Propylene) valve also good very cheap in compare of MSTL- but life is not long if no of time use
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#7

Re: Best Valves for HF, HCl, HNO3 Acid Solutions

03/02/2009 9:29 AM

Have a look at borosilicate glass as well. The two manufacturers that come to mind are Roche and QVF (usual disclaimer).

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Users who posted comments:

Anonymous Poster (2); EricChew (1); Israel (1); PWSlack (1); rahul.che@gmail.com (1); SardMan (1)

Previous in Forum: Alternative to AQ 50 Steel   Next in Forum: Tempered Laminated Glass - Distortion Specification?

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